关键词: 内乌肯盆地, 前陆盆地, 沉积构造演化, 石油地质

Abstract: Sedimentary and tectonic evolution of the Neuquen basin is divided into three stages: the syn-rift stage (Late Triassic-Early Jurassic), depositional systems of fluvial, lacustrine and pyroclastics are developed; the post-rift stage (Early Jurassic-Early Cretaceous), two large transgression and regression cycles are developed, marine and lacustrine sediments occur in bottom cycle, while fluvial delta sediment in upper cycle; and foreland one (Late Cretaceous-Cenozoic), dominated by compressional mechanism, marine and continental sediments are developed. There are abundant petroleum resources in the Neuquen basin, in which the major source rocks are found in Vaca Muerta formation, the main productive reservoirs are sandstone and limestone of the Upper Jurassic-Lower Cretaceous. The cap rocks in the Jurassic or below it are distributed regionally, those above it are semi-regional. Petroleum in this basin is mainly found in surrounding parts, but gas is in the center. They are dominated by structural-stratigraphic traps. Thrust belt in western basin and surrounding heavy oil belt in eastern basin could be favorable areas for petroleum exploration.

Key words: Neuquen basin, foreland basin, sedimentary and tectonic evolution, petroleum geology